CN112031722A - Dispersed oil sludge profile control system and preparation method thereof - Google Patents
Dispersed oil sludge profile control system and preparation method thereof Download PDFInfo
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- CN112031722A CN112031722A CN202010861696.2A CN202010861696A CN112031722A CN 112031722 A CN112031722 A CN 112031722A CN 202010861696 A CN202010861696 A CN 202010861696A CN 112031722 A CN112031722 A CN 112031722A
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- 239000010802 sludge Substances 0.000 title claims abstract description 123
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000003921 oil Substances 0.000 claims abstract description 136
- 239000002245 particle Substances 0.000 claims abstract description 29
- 239000007790 solid phase Substances 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002270 dispersing agent Substances 0.000 claims abstract description 19
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 18
- 239000003381 stabilizer Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims abstract description 3
- 239000012071 phase Substances 0.000 claims description 27
- 238000003756 stirring Methods 0.000 claims description 24
- 238000000227 grinding Methods 0.000 claims description 12
- 229920001577 copolymer Polymers 0.000 claims description 11
- 239000004094 surface-active agent Substances 0.000 claims description 9
- 239000010881 fly ash Substances 0.000 claims description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 7
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical group [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 6
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 6
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 239000000295 fuel oil Substances 0.000 claims description 2
- 239000011499 joint compound Substances 0.000 claims description 2
- 230000035699 permeability Effects 0.000 claims description 2
- 238000002347 injection Methods 0.000 abstract description 12
- 239000007924 injection Substances 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 5
- 239000000725 suspension Substances 0.000 abstract description 4
- 239000013043 chemical agent Substances 0.000 abstract description 2
- 230000008021 deposition Effects 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 8
- 238000005303 weighing Methods 0.000 description 5
- 238000007667 floating Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- 238000010795 Steam Flooding Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a dispersed oil sludge profile control system and a preparation method thereof. The dispersed oil sludge profile control system consists of oil sludge, a dispersant, an emulsifier and a stabilizer; the dispersed oil sludge profile control system comprises the following components in percentage by mass: 0.3-1.0% of dispersant, 0.05-0.5% of emulsifier, 1.0-5.0% of stabilizer and the balance of oil sludge; the oil sludge refers to a mixture of mud, oil and water generated in the oil field production process. According to the characteristics of easy deposition, difficult injection and the like of the oil sludge, the specific dispersing agent, the emulsifying agent and the stabilizing agent are added into the oil sludge, so that the viscosity of an oil sludge system is greatly reduced, the suspension time of solid-phase particles in the oil sludge system is prolonged, the injection pressure of the oil sludge profile control system is reduced, and the depth of an injection pore channel of the oil sludge profile control system is increased. 2) The preparation method of the dispersed oil sludge profile control system provided by the invention has the advantages of simple and convenient operation process, low price of the used chemical agent and sufficient market supply.
Description
Technical Field
The invention relates to a dispersed oil sludge profile control system and a preparation method thereof, belonging to the technical field of oil and gas field development.
Background
Mud is one of the major contaminants produced during oil field development. In recent years, due to the gradual improvement of environmental regulations in China and the requirement of green development of China oil group companies, the problem of oil sludge treatment has attracted more and more attention. Through years of research and application, various oil sludge treatment technologies have been developed all over the world at present, and the main oil sludge treatment methods include a direct landfill method, an incineration treatment technology, a thermal cracking treatment technology, a microbial degradation method, a solvent extraction technology, an oil sludge reinjection profile control technology and the like. Due to the fact that the quantity of the oil sludge is large and the components are complex, oil sludge separation is difficult and the treatment cost is high, and the requirements of oil sludge treatment are difficult to meet through the existing technologies of landfill, microbial degradation, heat treatment, solvent extraction and the like. The Liaohe oil field changes the oil sludge into valuable based on the principle of 'being from oil reservoir to oil reservoir', forms a set of thick oil thermal recovery well oil sludge profile control technology, and is applied in scale for the first time in China. The technology has the advantages of simple process, low cost, good plugging effect and the like, and can improve the thermal recovery development effect of the thick oil while backfilling, purifying and sealing the oil sludge. However, because the solid phase content in the oil sludge is large, the oil sludge is easy to deposit in the injection process, the near-wellbore region is blocked, the injection pressure is high, and the injection depth of the oil sludge into the stratum is small. There is therefore a need for improvements to existing sludge profile control systems.
Disclosure of Invention
The invention aims to provide a dispersed oil sludge profile control system and a preparation method thereof.
The profile control system for the dispersed oil sludge provided by the invention comprises oil sludge, a dispersing agent, an emulsifying agent and a stabilizing agent;
the dispersed oil sludge profile control system comprises the following components in percentage by mass:
0.3-1.0% of dispersant, 0.05-0.5% of emulsifier, 1.0-5.0% of stabilizer and the balance of oil sludge;
the oil sludge refers to a mixture of mud, oil and water generated in the oil field production process.
The dispersed oil sludge profile control system comprises the following components in percentage by mass:
1) 0.3-0.5% of dispersant, 0.3-0.5% of emulsifier, 1.0-3.0% of stabilizer and the balance of oil sludge;
2) 0.5-1.0% of dispersant, 0.3-0.5% of emulsifier, 3.0-5.0% of stabilizer and the balance of oil sludge;
3) 0.3% of dispersant, 0.5% of emulsifier, 1.0% of stabilizer and the balance of oil sludge;
4) 0.5% of dispersant, 0.3% of emulsifier, 3.0% of stabilizer and the balance of oil sludge;
5) 0.3% of dispersant, 0.05% of emulsifier, 1.0% of stabilizer and the balance of oil sludge;
6) 1.0% of dispersant, 0.5% of emulsifier, 5.0% of stabilizer and the balance of oil sludge.
In the dispersed oil sludge profile control system, the oil sludge is any one of the following 1) to 3):
1) scum;
2) bottom mud;
3) preparing a sample on site, wherein the sample is a mixture of scum and bottom mud;
wherein, the solid phase content of the scum is 5 to 10 percent, the oil phase content is 3 to 7 percent, and the rest is water phase;
the solid phase content of the bottom mud is 10-20%, the oil phase content is 5-10%, and the rest is water phase;
the solid phase content of the on-site sample preparation is 5% -10%, the oil phase content is 3% -10%, and the balance is a water phase.
In the dispersed oil sludge profile control system, the dispersing agent is an acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, the molecular weight of the copolymer is 10-30 ten thousand, the molecular structure of the copolymer contains a carboxylic group with good dispersibility and a sulfonic group with strong polarity, the dispersing performance is excellent, and the copolymer is suitable for water with high pH, high alkalinity and high hardness, and the chemical structural formula of the copolymer is shown as a formula I;
in the dispersed oil sludge profile control system, the emulsifier is an OP type surfactant or a sulfonate surfactant;
the OP type surfactant is preferably OP-10;
the sulfonate surfactant is preferably sodium dodecyl benzene sulfonate.
In the dispersed oil sludge profile control system, the stabilizer can be superfine spherical fly ash with the particle size distribution range of 0.5-10 mu m and the d50 less than or equal to 3 mu m, and the main component is SiO2、Al2O3CaO and Fe2O3The stability of the oil sludge profile control system can be improved, and the viscosity of the oil sludge system can be reduced.
The invention also provides a preparation method of the dispersed oil sludge profile control system, which comprises the following steps:
stirring the oil sludge, then adding the dispersant, the emulsifier and the stabilizer, and then stirring to obtain the oil sludge.
In the preparation method, stirring is carried out in a grinding stirrer;
before the addition, the stirring conditions were as follows: stirring for 0.5-3 h at the rotating speed of 500-6000 rad/min;
after addition, the stirring conditions were as follows: stirring for 0.5-3 h at a rotation speed of 500-3000 rad/min.
The dispersed oil sludge profile control system provided by the invention can be used for liquid absorption profile control and high permeability channel plugging of heavy oil reservoirs which are mined by adopting modes of steam huff and puff, steam flooding, in-situ combustion and the like.
The invention has the following beneficial effects:
1) according to the characteristics of easy deposition, difficult injection and the like of the oil sludge, the specific dispersing agent, the emulsifying agent and the stabilizing agent are added into the oil sludge, so that the viscosity of an oil sludge system is greatly reduced, the suspension time of solid-phase particles in the oil sludge system is prolonged, the injection pressure of the oil sludge profile control system is reduced, and the depth of an injection pore channel of the oil sludge profile control system is increased.
2) The preparation method of the dispersed oil sludge profile control system provided by the invention has the advantages of simple and convenient operation process, low price of the used chemical agent and sufficient market supply.
Drawings
FIG. 1 is a photomicrograph of a dispersed sludge according to the invention.
Detailed Description
The experimental procedures used in the following examples are all conventional procedures unless otherwise specified.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
Example 1:
weighing 98.65g of oil sludge floating slag, wherein the solid phase content of the oil sludge floating slag is 7.5 percent, the oil phase content of the oil sludge floating slag is 5.3 percent, and the rest is water phase, and stirring for 0.5h by using a grinding stirrer at the rotating speed of 1000rad/min to ensure that solid phase particles in the oil sludge are dispersed into particles with smaller particle size and are uniformly dispersed in the water phase; adding 0.3g of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer; adding 0.05g of sodium dodecyl benzene sulfonate; adding 1g of fly ash (the particle size distribution range is 0.5-10 mu m, and d50 is less than or equal to 3 mu m); stirring for 0.5h at 500rad/min by using a grinding stirrer to obtain a dispersed oil sludge profile control system No. 1.
The micrograph of the profile control system of the dispersed oil sludge prepared in the embodiment is shown in fig. 1, and it can be seen that the particle size of the solid phase particles in the dispersed oil sludge prepared by the invention is smaller, and the dispersion is more uniform.
The viscosity of the dispersed oil sludge profile control system No. 1 prepared in this example was 3125 mPas at 60 ℃.
Example 2:
weighing 96.2g of oil sludge sediment with the solid phase content of 15.5 percent and the oil phase content of 7.8 percent and the balance of water phase, and stirring for 1.0h by using a grinding stirrer at the rotating speed of 1000rad/min to ensure that solid phase particles in the oil sludge are dispersed into particles with smaller particle size and are uniformly dispersed in the water phase; adding 0.5g of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer; adding 0.3g of sodium dodecyl benzene sulfonate; adding 3g of fly ash (the particle size distribution range is 0.5-10 mu m, and d50 is less than or equal to 3 mu m); stirring for 0.5h at 500rad/min by using a grinding stirrer to obtain a dispersed oil sludge profile control system No. 2. The viscosity of the dispersed oil sludge profile control system No. 2 prepared in this example was 4257 mPas at 60 ℃.
Example 3:
weighing 98.65g of oil sludge for field sample preparation, wherein the solid phase content of the oil sludge is 5.6%, the oil phase content of the oil sludge is 3.8%, and the balance is water phase, and stirring for 0.5h at the rotation speed of 1000rad/min by using a grinding stirrer to ensure that solid phase particles in the oil sludge are dispersed into particles with smaller particle size and are uniformly dispersed in the water phase; adding 0.3g of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer; adding 0.05g of sodium dodecyl benzene sulfonate; adding 1g of fly ash (the particle size distribution range is 0.5-10 mu m, and d50 is less than or equal to 3 mu m); stirring for 0.5h at 500rad/min by using a grinding stirrer to obtain a dispersed oil sludge profile control system No. 3. The viscosity of the dispersed sludge profile control system # 3 prepared in this example was 3451 mPas at 60 ℃.
Example 4:
weighing 93.5g of oil sludge for field sample preparation, wherein the solid phase content of the oil sludge is 5.6%, the oil phase content of the oil sludge is 3.8%, and the balance is water phase, and stirring for 0.5h at the rotation speed of 1000rad/min by using a grinding stirrer to ensure that solid phase particles in the oil sludge are dispersed into particles with smaller particle size and are uniformly dispersed in the water phase; adding 1g of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer; adding 0.5g of sodium dodecyl benzene sulfonate; 5g of fly ash (the particle size distribution range is 0.5-10 mu m, and d50 is less than or equal to 3 mu m) is added; stirring for 0.5h at 500rad/min by using a grinding stirrer to obtain a dispersed oil sludge profile control system No. 4.
The viscosity of the dispersed oil sludge profile control system No. 4 prepared in this example was 2276 mPas at 60 ℃.
Table 1 shows the viscosity of the oil sludge profile control system prepared in examples 1 to 4 and the viscosity of an untreated oil sludge sample, and it can be seen that the viscosity of the treated oil sludge profile control system is significantly reduced, and the viscosity reduction rate can reach 33% to 56%, thereby reducing the injection pressure.
Table 1 examples 1-4 sludge profile control system viscosity and untreated sludge sample viscosity
Example 5:
weighing 93.5g of oil sludge for field sample preparation, wherein the solid phase content of the oil sludge is 5.6%, the oil phase content of the oil sludge is 3.8%, and the balance is water phase, and stirring for 0.5h at the rotation speed of 1000rad/min by using a grinding stirrer to ensure that solid phase particles in the oil sludge are dispersed into particles with smaller particle size and are uniformly dispersed in the water phase; adding 1g of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer; adding 0.5g of OP-10 surfactant; 5g of fly ash (the particle size distribution range is 0.5-10 mu m, and d50 is less than or equal to 3 mu m) is added; stirring for 0.5h at 500rad/min by using a grinding stirrer to obtain a dispersed oil sludge profile control system No. 5.
The viscosity of the dispersed sludge profile control system No. 5 prepared in this example was 1956 mPas at 60 ℃.
Example 6:
50g of a field sample preparation oil sludge sample, a dispersed oil sludge profile control system No. 3, a dispersed oil sludge profile control system No. 4 and a dispersed oil sludge profile control system No. 5 are respectively weighed and placed in a transparent reagent bottle to observe the solid phase settling time, and the result is shown in Table 2. It can be seen that the suspension time of the solid phase particles in the dispersed oil sludge profile control system is far longer than that of the solid phase particles in an untreated oil sludge sample, so that the solid-liquid separation phenomenon in the oil sludge injection process can be effectively avoided, and the injection depth of the oil sludge is increased.
Table 2 in-situ sample preparation sludge sample and suspension time of solid particles in dispersed sludge profile control system
Claims (10)
1. A profile control system for dispersed oil sludge comprises oil sludge, a dispersant, an emulsifier and a stabilizer;
the dispersed oil sludge profile control system comprises the following components in percentage by mass:
0.3-1.0% of dispersant, 0.05-0.5% of emulsifier, 1.0-5.0% of stabilizer and the balance of oil sludge;
the oil sludge refers to a mixture of mud, oil and water generated in the oil field production process.
2. The dispersed oil sludge profile control system according to claim 1, wherein: the oil sludge is any one of the following 1) to 3):
1) scum;
2) bottom mud;
3) the sample is prepared on site and is a mixture of scum and bottom mud.
3. The dispersed oil sludge profile control system according to claim 2, wherein: the solid phase content of the scum is 5-10%, the oil phase content is 3-7%, and the balance is water phase;
the solid phase content of the bottom mud is 10-20%, the oil phase content is 5-10%, and the rest is water phase;
the solid phase content of the on-site sample preparation is 5% -10%, the oil phase content is 3% -10%, and the balance is a water phase.
4. A dispersed sludge profile control system according to any one of claims 1 to 3, wherein: the dispersing agent is acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, and the molecular weight of the dispersing agent is 10-30 ten thousand.
5. A dispersed sludge profile control system according to any one of claims 1 to 4, wherein: the emulsifier is OP type surfactant or sulfonate surfactant.
6. The dispersed oil sludge profile control system according to claim 5, wherein: the OP type surfactant is OP-10;
the sulfonate surfactant is sodium dodecyl benzene sulfonate.
7. A dispersed sludge profile control system according to any one of claims 1 to 6, wherein: the stabilizer is superfine spherical fly ash, the particle size distribution range of the superfine spherical fly ash is 0.5-10 mu m, and d50 is less than or equal to 3 mu m.
8. A method of preparing a dispersed oil sludge profile control system as claimed in any one of claims 1 to 7, comprising the steps of:
stirring the oil sludge, then adding the dispersant, the emulsifier and the stabilizer, and then stirring to obtain the oil sludge.
9. The method of claim 8, wherein: stirring in a grinding stirrer;
before the addition, the stirring conditions were as follows: stirring for 0.5-3 h at the rotating speed of 500-6000 rad/min;
after addition, the stirring conditions were as follows: stirring for 0.5-3 h at a rotation speed of 500-3000 rad/min.
10. Use of the dispersed oil sludge profile control system according to any one of claims 1 to 7 in liquid suction profile control and high permeability channel plugging of heavy oil reservoirs.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114605977A (en) * | 2020-12-09 | 2022-06-10 | 中国石油天然气股份有限公司 | Oil-mud water swelling suspension profile control solution and preparation method thereof |
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| CN209968315U (en) * | 2019-05-16 | 2020-01-21 | 长江大学 | System is prepared to oily sludge profile control agent |
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-
2020
- 2020-08-25 CN CN202010861696.2A patent/CN112031722A/en active Pending
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| US20140076568A1 (en) * | 2012-09-20 | 2014-03-20 | Michael J. McDonald | Use of aqueous alkali aluminosilicate for profile modification, water control and stabilization |
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| CN107815300A (en) * | 2017-11-08 | 2018-03-20 | 中国石油化工股份有限公司 | A kind of oily sludge profile control blocking agent and preparation method thereof |
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| CN114605977A (en) * | 2020-12-09 | 2022-06-10 | 中国石油天然气股份有限公司 | Oil-mud water swelling suspension profile control solution and preparation method thereof |
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